Corsair Vengeance LPX 16GB (4x4GB) DDR4 DRAM 2666MHz (PC4-21300) C15 Memory Kit - Black Low profile, XMP enabled, DDR4 ram. Cas Latency 15 Stock Timing 15-17-17-35 Voltage 1.2V Designed for high-performance overclocking Designed for great looks Performance and Compatibility Low-profile heatspreader design Low-profile heat spreader design